Back-to-back performances; back-to-back home runs.
Ruth and Gehrig hit back-to-back home runs.
They sat through two back-to-back movies.
We lived in a row of back-to-back houses.
Stand back-to-back so that we can see which of you is taller.
If two cones are placed back to back the belt tends to rise to the ridge and stay there.
She ran hard, spotting Yully and Charles fighting back-to-back at the base of the obelisk.
The engines were mounted back-to-back in pairs, with the forward unit driving a tractor airscrew and the aft facing unit a pusher propeller.